Unit Eater vs BasicCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Unit Eater
This utility app functions as a powerful calculator that handles unit conversions and calculations. It supports a vast array of predefined units and allows users to define their own, making it ideal for scientific and academic tasks. Features include a calculation history, customizable results, and dark mode.
- Unit conversion and calculation
- Custom unit definition
- Extensive unit library
- Calculation history
- Customizable result format
- Dark mode
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Unique calculator that not only converts units, but can also perform calculations with them. Perfect for school, university, work, or personal use! For math, physics, chemistry, biology, engineering, or any other natural sciences! - Standard calculator functions usable with or without units - Target unit freely definable - Define your own units if you need them - History of recent calculations - Quick transfer of parts or entire calculations from history - ANS function to dynamically use the last result - Customizable result format - Quick search - Quick access to important functions like square or cube - Undo and redo of last steps - Dark mode Boost your productivity, focus on the essentials, and leave conversion errors in the past! Supports many units, prefixes, and constants: * Prefixes: kilo, mega, giga, tera, centi, milli, micro, nano, … * Constants: mass of proton, neutron, electron, Avogadro's constant, electric field constant, gas constant, Planck's constant, … * Angles: radian, degree, degree-minute, degree-second, gradian, turn, steradian, … * Length: meter, mile, inch, foot, yard, nautical mile, chain, furlong, cable length, rod, … * Area: square meter, hectare, acre, are, square kilometer, square inch, square foot, square yard, … * Volume: liter, cubic meter, fluid ounce, gallon, gill, pint, quart, barrel, tablespoon, teaspoon, … * Mass: gram, ton, ounce, pound, carat, grain, … * Time: second, minute, hour, day, year, … * Speed: meter per second, kilometer per hour, miles per hour, knot, speed of light, … * Acceleration: gravitational acceleration, meter per second squared, … * Energy: joule, kilocalorie, erg, watt-hour, electronvolt, … * Power: watt, horsepower, … * Force: Newton, pond, kilopond, tf, ozf, lbf, … * Torque: Newton meter, ozfin, ozfft, lbf*in, … * Frequency: Hertz, revolutions per minute, … * Pressure: pascal, bar, atm, at, Torr, mmHg, osi, ose, psi, psf, … * Viscosity: Poise, Stokes, … * Density: gram per cubic centimeter, kg per cubic meter, … * Radiation: Becquerel, Curie, Rutherford, Roentgen, Gray, Sievert, rem, … * Light: candela, lumen, lux * Electricity: volt, ampere, ohm, coulomb, elementary charge, farad, siemens, … * Magnetism: Weber, Tesla, Henry, … Is your desired unit not listed? You can define any additional units! Privacy Policy: https://www.iubenda.com/privacy-policy/22446614 Terms and Conditions: https://www.iubenda.com/terms-and-conditions/22446614
BasicCalc
This app offers both basic and advanced scientific calculation modes with a clean interface and large buttons. It features a persistent history of your last 30 operations and works offline on your iPhone or iPad.
- Basic and Scientific calculation modes
- Large, easy-to-tap buttons
- Persistent calculation history (last 30 ops)
- Works offline
- Dark theme option
- Supports iPhone and iPad
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*** #1 App Calculator in 10 countries! *** No ads or Purchases, just Math! *** BIG Buttons! *** Basic and Simple! ----------------------------------------------------- BasicCalc is the calculator that adapts to you. Start in Basic mode for everyday math, then switch to Scientific mode when you need more power — all in one tap. BASIC MODE • Clean, distraction-free calculator for daily use • Large buttons designed for easy tapping • Left-to-right calculation — what you see is what you get SCIENTIFIC MODE • Full scientific calculator with proper operator precedence • Trigonometric functions: sin, cos, tan, asin, acos, atan • Logarithms: ln, log • Powers and roots: x², x³, √, ∛, ^ • Constants: π, e, random number generator • Parentheses for complex expressions • Degree/Radian toggle • 2nd button doubles available functions SMART FEATURES • Persistent calculation history — review your last 30 operations • Works on both iPhone and iPad • Dark theme — easy on your eyes • No account needed, no internet required Download BasicCalc — the only calculator you need.
Screenshots
Verdict
The clearest difference is in-app purchases: BasicCalc at none against Unit Eater's 2. Unit Eater's advantage is update cadence (every 2 weeks vs every 17 months) and iOS requirement (12.0 vs 15.6). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Unit Eater sells 2 in-app purchases, starting at $0.99 per month. BasicCalc asks for nothing beyond the download.
Unit Eater ships an update every 2 weeks, BasicCalc every 17 months. The most recent releases landed on September 11, 2026 and August 19, 2026 respectively.
| Parameter | Unit Eater | BasicCalc |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 weeks — better | Every 17 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 65 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Tom Leon Schmidt | Rodrigo Belloso |
Customer experience
Unit Eater
BasicCalc
In-app purchases
Unit Eater
- Premium - Monthly$0.991 Month
- Premium - Pay once$3.99
BasicCalc
No in-app purchases





